panic: inp_leave_group: imf_sources not empty
cpuid = 0
time = 1558299277
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x47/frame 0xfffffe001f845520
vpanic() at vpanic+0x1e0/frame 0xfffffe001f845580
panic() at panic+0x43/frame 0xfffffe001f8455e0
inp_setmoptions() at inp_setmoptions+0x40bd/frame 0xfffffe001f8457c0
ip_ctloutput() at ip_ctloutput+0x80f/frame 0xfffffe001f845810
rip_ctloutput() at rip_ctloutput+0x2c9/frame 0xfffffe001f845850
sosetopt() at sosetopt+0x101/frame 0xfffffe001f8458d0
kern_setsockopt() at kern_setsockopt+0x158/frame 0xfffffe001f845950
sys_setsockopt() at sys_setsockopt+0x33/frame 0xfffffe001f845980
amd64_syscall() at amd64_syscall+0x436/frame 0xfffffe001f845ab0
fast_syscall_common() at fast_syscall_common+0x101/frame 0xfffffe001f845ab0
--- syscall (0, FreeBSD ELF64, nosys), rip = 0x45762a, rsp = 0x7fffdffdcf88, rbp = 0x6b5bc0 ---
KDB: enter: panic
[ thread pid 864 tid 100305 ]
Stopped at      kdb_enter+0x6a: movq    $0,kdb_why